Pull-Out Shelf on Drawer Slides 13.8″ Effective Surface 2 RU Height, Holds up to 55 lb Powder Coated Black Steel Add a convenient pull-out shelf to your rack with theAdam Hall2 RU 19″ Rack Tray with Drawer Slides. The steel tray is two rack units in height and has a depth of 14.1″, an inner height of 2.9″, and offers a 13.8″ effective work surface. The tray has a maximum capacity of 55 pounds and features a black powder coat finish.